Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 105 L, Cylinder Diameter 3.2 in, Cylinder Height 12.8 in, For Use With All OEM Gas Detectors, Gas Mixture Carbon Dioxide 50 Percent, Gas Type Carbon Dioxide, Product Type Calibration Gas, Chemical Formula CO2, CAS Number 124-38-9, Accuracy +/-2 Percent, Background Gas Methane, Calibration Certificate NIST, Cylinder Material Aluminum Alloy, Outlet Connection Size 5/8 In.-18, Outlet Connection Type UNF